JPH1035319A - Hand lever system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To hold movable mechanism members, e.g. main lever or the like in a case member in appropiate position even when the case member is separated and detached from a handle. SOLUTION: A case member comprises a one side cover case 21, a middle cover case 22, and an another side cover case 23 so that the case member is divided into three parts. By removing the another side cover case 23 from the one side cover case 21 and the middle cover case 22, the stationary condition of the case member on a handle 7 is relaxed, and instaneously a main lever 30 for puling a cable 17 connected to a member to be driven is held in between the one side cover case 21 and the middle cover case 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hand lever device for operating a driven member such as a throttle valve of an internal combustion engine via a cable, and more particularly to a handle for a working machine such as a hedge trimmer or a bush cutter. The present invention relates to a device which is disposed near a grip portion and is suitable for opening and closing the throttle valve through a throttle cable.

[0002]

2. Description of the Related Art For example, in a working machine such as a hedge trimmer or a bush cutter driven by a working unit such as a cutting blade by an internal combustion engine, the output of the internal combustion engine is adjusted at hand. A hand lever device for adjusting the opening of a throttle valve of the internal combustion engine is disposed near a grip portion such as a U-shaped handle or a bar handle.

This hand lever device usually has a throttle trigger (throttle lever) which is operated by the operator's finger. When the throttle lever is rotated, the throttle valve is opened via a throttle cable. The degree is adjusted. Normally, the throttle valve is normally biased in the direction of the minimum opening (idling rotation opening), and is held at the idle rotation opening in a natural state, and play is provided when the throttle cable is pulled for a predetermined length or more. Then, it is started to open from the idle rotation opening to the high-speed rotation side.

In such a hand lever device for adjusting the opening degree of a throttle valve, when the throttle lever is released from a rotating operation state, the lever is automatically moved together with the throttle valve to its original position (idle rotation). (Opening degree) and a fixed type that can always hold the throttle lever at a desired rotational operation position even when the finger is released. Is known (see Japanese Utility Model Publication No. 57-19944).

In the automatic return type, when the finger is released from the throttle lever, the engine automatically returns to the idling state, and the engine rotational driving force is transmitted to a working unit including a cutting blade or the like via a centrifugal clutch. Work machine,
Since the centrifugal clutch is disengaged and power transmission to the working unit is cut off, in the event of an unexpected situation, the working unit can be stopped by immediately returning the throttle valve to the idle rotation opening. On the other hand, while the advantage that safety is enhanced is obtained, the throttle lever must be always held by a finger to maintain a desired rotational operation position, so that it is difficult to use the intermediate opening degree, the finger becomes tired, and the operation amount ( Rotation speed) is not constant.

In general, in consideration of usability, a rotary operation lever operated by a finger such as a throttle lever can take only two positions of a release position and a set position (grip position) without taking an intermediate opening degree. It is desirable that the same rotary operation position (set position) is superior in operability when the throttle valve is set to the intermediate opening (partial opening) and fully opened (WOT). Can be On the other hand, the fixed type can solve the problem of the automatic idle rotation opening degree return type, and can always hold the throttle lever in a desired rotation operation position even when the hand is released, so that the fixed state can be maintained. Although there are advantages such as the freedom of fingers and ease of work, there is a need for another operation to release the position holding function of the throttle lever in the event of an unexpected situation, and the working unit is immediately stopped Therefore, there is a problem in that the safety is inferior to that of the automatic idle rotation opening return type.

In any of the above-mentioned types, after the throttle lever is once released and the operation is interrupted, the throttle valve is returned to the previous opening to resume the operation (in working machines such as brush cutters, etc.). In many cases), the rotational operation position of the throttle lever must be readjusted, and the operation is troublesome, and there is still room for improvement in operability. In order to solve or achieve the conventional problems and problems related to the hand lever device as described above, the applicant of the present invention
First, for example, as described in Japanese Patent Application No. 7-108340, a cable having a main lever and a sub-lever that are operated to rotate and connected to a driven member via a folding member such as a moving pulley is provided. To pull on the sub-lever,
In addition, a hand lever device has been proposed in which the folding member is moved by the main lever.

According to such a hand lever device, the opening of a throttle valve or the like as a driven member can be adjusted via a cable, can be easily held at a desired opening, and can be immediately reduced to a minimum opening (idle (Rotational opening) to ensure high safety, reduce finger fatigue, and eliminate the need for readjustment if you want to set the throttle valve to the opening before returning to idle rotation. Can be obtained.

[0009]

However, in the hand lever device proposed above, the amount of pulling of the cable depends on the amount of turning operation of the main lever.
Unless the main lever is rotated relatively large, the cable cannot be pulled by a required amount.Accordingly, in order to obtain a required amount of rotation operation on the main lever, a handle grip portion is provided. A relatively large rotation space is required between the main lever and the main lever. As a result, the size of the apparatus is increased, the weight is increased, and the workability and operability are not good.

Therefore, in order to solve the above problems,
The applicant of the present invention has proposed a hand lever device having the following configuration simultaneously with the present invention. That is, in this proposal, a case member is externally fitted and fixed to a handle, and this case member is
A main lever for pulling a cable connected to the driven member through a folding member is rotatably held, and a rotation operation amount of the main lever is provided between the main lever and the cable in the case member. And a position adjusting mechanism for forcibly moving the folded member in a direction in which the cable is pulled and holding the folded member at an arbitrary position while interposing a tensile amount expanding mechanism for transmitting the cable to the cable. It is.

In the above-mentioned conventional hand lever device, as shown in Japanese Patent Publication No. 7-106098, for example, a case having a split structure for holding and storing a movable mechanism member such as a main lever is usually used. A member (a right cover case and a left cover case) is provided, and the right cover case and the left cover case constituting the case member are closed so as to sandwich the handle, and both are fastened with bolts. The hand lever device is attached to the device. However, in the conventional hand lever device provided with the case member having the split structure as described above, a movable mechanism member such as a main lever is held and housed between the right cover case and the left cover case constituting the case member. Therefore, when the right cover case and the left cover case are separated, that is, when the case member is separated and detached from the handle, before assembling to the handle of the device or at the time of maintenance and inspection, etc. It is difficult to properly hold a movable mechanism member such as a main lever to (one of) the case member, and the work of assembling the hand lever device to the handle and the maintenance and inspection work have been troublesome.

Further, in the conventional hand lever device, the device is attached to the handle only by closing the right cover case and the left cover case constituting the case member and tightening them with bolts. However, there is a problem in that it is easy to rotate around the handle or to move in the longitudinal direction. If the case member is rotated or moved with respect to the handle, not only will the operability deteriorate, but also the tip of the cable will be slightly displaced. And the throttle valve opening and the like become inaccurate.

The present invention has been made in view of such a problem, and an object of the present invention is to solve the problem even when the case member is separated and separated from the handle.
It is an object of the present invention to provide a hand lever device capable of appropriately holding a movable mechanism member such as a main lever to a case member, thereby facilitating an assembling operation and a maintenance and inspection operation. . It is another object of the present invention to provide a hand lever device capable of reliably preventing rotation and movement of a case member with respect to a handle with a relatively simple configuration.

[0014]

In order to achieve the above object, a hand lever device according to the present invention basically has a case member externally fixed to a handle, and the case member is provided with a cover. A main lever for pulling a cable connected to a driving member via a folding member is rotatably held. In a further preferred aspect, the main lever is provided between the main lever and the cable in the case member. And a position adjusting mechanism for moving the folded member and holding it at an arbitrary position is provided.

The case member has a three-part structure including a one-side cover case, an intermediate cover case, and another side cover case, and the other-side cover case is removed from the one-side cover case and the intermediate cover case. The externally fixed state of the case member to the handle is released, and the main lever, the tension expanding mechanism, the folding member, and the position adjusting mechanism are held only by the one-side cover case and the intermediate cover case. It is characterized by that.

In the hand lever device of the present invention having such a configuration, when the hand lever device is attached to the handle, the main lever, the tension increasing mechanism, the folding member, A movable mechanism member such as a position adjusting mechanism is stored and held, and an intermediate cover case is assembled to one side cover case using bolts or the like.

Next, the assembled body of the one-side cover case and the intermediate cover case accommodating and holding the movable mechanism member and the other-side cover case are closed so as to sandwich the handle, and both are fastened with screws. . As a result, the one-side cover case, the intermediate cover case, and the other-side cover case constituting the case member are externally fixed to the handle. In this manner, the hand lever device of the present invention attached to the handle is configured such that the one-side cover case and the intermediate cover case attached thereto are detached from the other-side cover case, whereby the case member is externally fixed to the handle. Is solved.

When the case member is released from the fixed state and the one-side cover case, the intermediate cover case, and the other-side cover case constituting the case member are separated and separated from the handle, in other words, For example, before assembling the hand lever device to the handle, at the time of maintenance and inspection, or the like, the main lever, the tension increasing mechanism, the folding member, and the position adjusting mechanism are formed only by the one-side cover case and the intermediate cover case. And other movable mechanism members are held. For this reason, in the hand lever device of the present invention, as compared with the conventional two-part structure hand lever device in which it is difficult to appropriately hold the movable mechanism member on (one of) the case member, it is assembled to the handle. Work and maintenance work become extremely easy.

In a preferred aspect of the present invention, a recess is provided in one of the handle and the case member (at least one of the one-side cover case, the intermediate cover case, and the other-side cover case), On the other hand, there is provided a convex portion that fits into the concave portion. When the case member is attached to the handle as described above, the concave portion and the convex portion are fitted, and the whole is externally fixed to the handle.

As described above, by fixing the case member to the handle in a state in which the concave portion and the convex portion provided on the handle and the case member are fitted, the case is formed by the fitting action of the concave portion and the convex portion. Rotation of the member about the handle is prevented and longitudinal movement is also prevented. As a result, stable operability can be obtained at all times, the tip position of the cable does not shift, the amount of pulling of the cable becomes constant with respect to the amount of operation of the main lever and the position adjusting mechanism, and the opening degree of the throttle valve and the like are reduced. It will be accurate.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of a brush cutter in which an embodiment of the hand lever device according to the present invention is employed. The illustrated brush cutter 1 includes a working unit 3 including a cutting blade 13, a safety cover 14, and the like at a tip end of a cylindrical bar handle (operation rod) 7 having grip portions 11, 12 arranged side by side at a predetermined interval. A recoil starter 6 and a fuel tank 4 as power sources for driving the cutting blade 13 via a drive shaft (not shown) inserted into the bar handle 7 are attached to the rear end side. An internal combustion engine (small air-cooled two-cycle gasoline engine) 2 is provided. The internal combustion engine 2 is provided with a carburetor (not shown) having a throttle valve CV and a spark plug 5.

In this embodiment, the throttle valve CV
Is always urged in the minimum (idle rotation) opening direction and is connected to a throttle (inner) described later.
When the cable 17 (FIG. 5) is pulled from the non-operation state for a predetermined length or more, play is eliminated and the cable 17 (FIG. 5) is opened from the minimum opening. And the grip 11,
The rear grip portion 11 which is normally held with the right hand among the 12
In the vicinity, a hand lever device 10 of the present embodiment is attached to adjust the opening of the throttle valve CV.

The hand lever device 10 is shown in FIGS.
As shown in FIG. 1, the case member 2 is fitted around the handle 7 in the vicinity of the rear grip portion 11.
0, and the case member 20 has the throttle valve CV
A main lever 30 for pulling the throttle cable 17 inserted through the after tube 16 of the Bowden cable 15 connected to the main body 30 is rotatably held.
6 and 7, the case member 20 has a three-part structure including a right cover case 21, an intermediate cover case 22, and a left cover case 23 made of synthetic resin.

Each of the right cover case 21 and the left cover case 23 has a substantially square dish-like appearance, as shown in FIG. 1 and FIG. As can be easily understood, the screw holes 21a, 21a, 21b, 21
b and insertion holes 23a, 23a, 23b, 23b are provided, and screws 24, 2 are provided in the screw holes 21a, 21a and the insertion holes 23a, 23a located on the upper side, respectively.
4 is screwed into the screw hole 2 located at the lower side.
Screws 25, 25 are screwed into the insertion holes 1b, 21b and the insertion holes 23b, 23b, respectively.

Thus, the right cover case 21
And the left cover case 23, with the intermediate cover case 22 interposed therebetween, and the semi-circular cross-section contact surface portions 21A, 21A, 22 provided at the front and rear ends thereof.
A, 22A are fixed to the outside so that the handle 7 is sandwiched between the outer peripheral surface of the handle 7 and the outer surface of the handle 7. The intermediate cover case 22 interposed between the right cover case 21 and the left cover case 23 is shown in FIG. 5 in which the left cover case 23 is removed in addition to FIG. 10 and FIG. As you can see from the reference,
The screw 2 is positioned between the screw holes 21b, 21b located on the lower side and the insertion holes 23b, 23b.
Insertion holes 22b, 22b through which the holes 5 and 25 are inserted are formed, and a contact surface portion 22A having a semicircular cross-section that is brought into contact with a lower portion of the right outer peripheral surface of the handle 7 is provided.
Fastening screws 26, 26 screwed into screw holes 21c, 21c provided near the front and rear ends in the center of the right cover case 21 are inserted near the front and rear ends of the upper part of the contact surface 22A. Insertion holes 22c, 22c are formed.
6 and 26, it is assembled and fixed to the right cover case 21.

In the contact surface 22A of the intermediate cover case 22, a circular recess 9 which does not penetrate in the thickness direction and is provided near the center of the right outer peripheral surface of the cylindrical handle 7 is fitted. A projection 29 for preventing rotation to be fitted is provided. The main lever 30 rotatably held by the case member 20 is close to a lever receiving portion 11a provided at a lower end of the rear grip portion 11, as can be clearly understood from FIGS. Operating portion 31, which is rotated with fingers as described above, a cylindrical portion 32 loosely fitted to a support shaft 35, and a base end side is connected to the cylindrical portion 32, and is bent so as to be slightly twisted diagonally rightward upward. Curved part 3
The right end of the support shaft 35 is press-fitted into an insertion hole 21d formed near the lower rear corner of the right cover case 21, and the left end is formed in the intermediate cover case 22. The insertion hole 23d formed in the left cover case 23 while being press-fitted into the inserted insertion hole 22d.
d.

Here, the throttle cable 17 is pulled by the main lever 30 having the above-described structure into a pulling amount expanding mechanism 40.
And it is configured to be pulled through a pulley 45 (FIG. 5) which is a folded member. The tension expansion mechanism 40
7 and 8, a bearing hole 21g provided at a lower portion on the front end side of the right cover case 21, a shaft supporting portion 21f provided near a center portion, and the intermediate cover case. 22f provided on the shaft 22
The lever 41 includes a lever 41 rotatably fitted to a support shaft 42 having both ends supported thereon. The throttle cable 1 is attached to the distal end (left end) of the long side half body 41A of the lever 41.
An end fitting 19 attached to the tip of the base 7 is fitted and locked.

The tip of the outer tube 16 of the Bowden cable 15 through which the throttle cable 17 is inserted is locked by a locking portion 22i provided on the intermediate cover case 22, and the throttle cable 17 is Slit 2 provided at the front end of locking portion 22i
The lever 41 is pulled out from the lever 41 to the long half body 41A side of the lever 41 and connected thereto. Also, the tip (right end) of the short side half body 41B of the lever 41 and the main lever 3
The end fittings 19 attached to both ends of the cable 18, which is wound around a pulley 45, which is a folded member, is attached to the distal end cylindrical portion 33 a of the zero curved portion 33, respectively.
19 is fitted and locked.

In such a configuration, as can be clearly understood with reference to FIG.
When 1) is rotated in a direction approaching the rear grip portion 11, the short-side half body 41B of the lever 41 is pulled rearward via the cable 18, and the lever 41 rotates clockwise in plan view. In the direction of
The throttle cable 17 is pulled forward by the long half body 41A of the lever 41 and pulled out. In this case, the amount of pulling of the throttle cable 17 by the main lever 30 is increased by the lever ratio of the lever 41. Further, in the present embodiment, a position adjusting mechanism 50 for forcibly moving the pulley 45 in a direction in which the throttle cable 17 is pulled (rearward) and holding the pulley 45 immovably at an arbitrary position is provided.

4 to 7, the position adjusting mechanism 50 includes a rotating shaft 60 having a storage portion 64 for storing the pulley 45, and a right end of the rotating shaft 60. A sub-lever 51 provided with a serration portion 52 fitted to the provided serration shaft portion 62 and fixed to a right end portion of the rotating shaft 60 with a screw 55 is provided. The left end of the rotating shaft 60 is supported by a bearing 22 e provided on the right side of the intermediate cover case 22, and the right end thereof is a bearing 21 provided on the right cover case 21.
e, and the pulley 4 is
5 is rotatably supported by a pin 46. Here, the pin 46 supporting the pulley 45 with respect to the rotation axis O of the sub-lever 51 (the center axis of the rotation shaft 60).
Is eccentrically arranged at a position deviated upward by a predetermined distance E, and when the sub-lever 51 is rotated rearward, the pulley 45 pulls the throttle cable 17 (in the direction in which the pulley 45 pulls the throttle cable 17). Back).

A cylindrical push button 53 having an open lower surface is slidably inserted in the upper part of the sub-lever 51 so as to be vertically slidable. Energized bottomed sleeve 5
7 is slidably fitted in the front-rear direction with its bottom protruding downward and in contact with the right shoulder of the right cover case 21.

On the left side of the lower end of the push button 53, a saw-toothed movable side tooth portion 58 is provided facing upward, and the upper portion of the right cover case 21 can be seen with reference to FIGS. As can be seen, the fixed-side teeth 28 having a sawtooth shape meshing with the movable-side teeth 58 are provided downward and in the front-rear direction so as to draw an arc around the rotation axis O of the sub-lever 51. I have. Position adjusting mechanism 50 having such a configuration
In this case, when the push button 53 is pressed, the meshing state between the movable-side tooth portion 58 and the fixed-side tooth portion 28 is released, and when the push button 53 is pulled to any position on the rear side, the sub-lever 51 is pressed. Swings rearward, the pulley 45 is moved in the pulling direction of the throttle cable 17 (rearward). In this state, when the pressing of the push button 53 is released, the movable tooth portion 58 is released.
And the fixed tooth portion 28 are meshed again, and the sub-lever 51 and the pulley 45 are held at the rotation operation position at that time.

A rectangular notch 2 formed at the center of the upper surface of the right cover case 21 and the left cover case 23
At 1k and 23k, a slide stop switch 67 for shutting off the power supply to the ignition plug 5 of the internal combustion engine 2 and stopping the engine 2 is attached so as to be sandwiched therebetween. When attaching the hand lever device 10 of this embodiment having the above-described configuration to the handle 7, the main lever 30, the tension increasing mechanism 40, the pulley 45 are formed by the right cover case 21 and the intermediate cover case 22. And the movable mechanism members such as the position adjusting mechanism 50 are housed and assembled, and the intermediate cover case 22 is assembled to the right cover case 21 using two screws 26 (see FIGS. 5, 10, and 11).

Next, a subassembly composed of the right cover case 21 and the intermediate cover case 22 accommodating and holding movable mechanism members such as the main lever 30, the pulling amount expanding mechanism 40, the pulley 45, and the position adjusting mechanism 50 are described. The handle 7 is closed with the left cover case 23 so as to sandwich the handle 7 therebetween. At this time, the recess 9 provided in the handle 7
The protrusion 2 provided on the intermediate cover case 22
Then, the right cover case 21 and the intermediate cover case 22 and the left cover case 23 are fastened to each other with four bolts 24 and 25. Thereby, the right cover case 21, the intermediate cover case 22, and the left cover case 23 constituting the case member 20 are externally fixed to predetermined positions of the handle 7.

As described above, the hand lever device 10 of the present embodiment attached to the handle 7 comprises the right cover case 21 and the intermediate cover case 2 assembled thereto.
By detaching the left cover case 23 from 2, the externally fixed state of the case member 20 to the handle 7 is released. As described above, the right-side cover case 21, the intermediate cover case 22, and the case member 20 are released from the handle 7 to form the case member 20 from the handle 7.
When the left cover case 23 is separated and detached, in other words, before assembling the hand lever device 10 to the handle 7 or at the time of maintenance, as shown in FIG. Case 2
1 and the intermediate cover case 22 alone.
0, the movable mechanism members such as the tension amount expanding mechanism 40, the pulley 45, and the position adjusting mechanism 50 are held in an assembled state.

For this reason, in the hand lever device 10 of the present embodiment, it is difficult to properly hold the movable mechanism member on (one of) the case member as compared with the conventional hand lever device having a split structure. In addition, the work of assembling to the handle and the work of maintenance and inspection become extremely easy. Also,
The handle 7 is provided with a concave portion 9, and the intermediate cover case 22 is provided with a convex portion 29 which fits into the concave portion 9. The handle 7 is fitted with the concave portion 9 and the convex portion 29.
By externally fixing the case member 20 to the outside, the rotation of the case member 20 around the handle and the longitudinal movement of the case member 20 are also prevented by the fitting action of the concave portion 9 and the convex portion 29.

As a result, stable operability is obtained at all times, the tip position of the throttle cable 17 does not shift, and the amount of pulling of the cable 17 is constant with respect to the amount of operation of the main lever 30 and the position adjusting mechanism 50. Becomes
The opening degree and the like of the throttle valve CV become accurate. In the hand lever device 10 of the present embodiment configured as described above, when the main lever 30 is rotated to the set position close to the rear grip portion 11 of the handle 7, the lever 41 is used by the throttle cable 17. The play is eliminated by being pulled for a predetermined length through the pulled amount expanding mechanism 40 and the pulley 45 which is a folded member.

In this case, the pulling amount (displacement amount) of the cable 17 by the main lever 30 is expanded by the pulling amount expanding mechanism 40, so that the rotation of the main lever 30 required for pulling the cable 17 by the required amount is performed. The moving operation angle α can be smaller than that of the related art. Therefore, the rear grip portion 11 of the handle 7 and the main lever 30
And the space required for rotation between them can be reduced, and as a result, the device is reduced in size and weight,
Workability and operability are also improved.

Next, while holding the main lever 30 at the set position and pressing the push button 53 provided on the position adjusting mechanism 50 to operate the sub-lever 51 to a desired position on the rear side, the pulley 45 Is forcibly moved in the direction in which the throttle cable 17 is pulled, whereby the throttle cable 17 is further pulled through the pulling amount increasing mechanism 40 and the pulley 45, and the throttle valve CV is set to the minimum opening (idle opening). ), And the opening is adjusted.

In this case, since the throttle cable 17 is pulled by the pulley 45 while being wrapped around the pulley 45, the length of the pulley 45 is twice as long as the amount of movement of the pulley 45. Therefore, the sub-lever 51 of the position adjusting mechanism 50 required to adjust the opening of the throttle valve CV is adjusted.
In other words, the operation amount of the pulley 45, that is, the movement amount of the pulley 45, may be small. Here, even if the sub-lever 51 is released,
Is held in an immobile state at the operation position at that time by the engagement of the movable-side tooth portion 58 and the fixed-side tooth portion 28, and the throttle valve CV is held at the adjusted opening (set opening). Thereby, the burden on the fingers is reduced.

In the state where the opening of the throttle valve CV is adjusted as described above, when it is desired to drastically reduce the rotation speed of the engine 10 immediately due to, for example, an unexpected situation,
The main lever 30 is released. As a result, the throttle cable 17 is constantly biased in the throttle valve CV closing direction, so that the main lever 30 and the lever 41 of the tension increasing mechanism 40 are pulled in the opposite direction to return to the original position. Then, the throttle cable 17 is returned to the non-operating state, the throttle valve CV returns to the idle rotation opening, and the engine 10 enters an idling state. Here, in the case of the working machine 1 that transmits the engine rotation driving force to the working unit 3 including a cutting blade or the like via the centrifugal clutch, the centrifugal clutch is in a cutoff state and power is transmitted to the working unit. Is cut off, the working part 3 such as the cutting blade 13 is cut off.
Is stopped immediately.

When the main lever 30 is once released and then rotated again to the set position close to the rear grip 11, the play of the throttle cable 17 is eliminated and the position of the throttle cable 17 is reduced. Since the sub-lever 51 provided in the adjusting mechanism 50 is maintained at the previous operation position, the throttle valve CV is returned to the opening before the main lever 30 was released, and
Re-adjustment of the sub-lever 51 becomes unnecessary.

As described above, in the hand lever device 10 of the present embodiment, the throttle valve C as the driven member
The opening of the V can be adjusted via the cable 17 and can be easily maintained at a desired opening, and can be immediately returned to the minimum opening (idle rotation opening) to ensure high safety. , Makes your fingers less tiring, and
If it is desired to set the throttle valve CV to the opening before returning to the idle rotation opening, readjustment is not required, and the size and weight of the device can be effectively reduced, thereby improving workability and operability. be able to.

As described above, one embodiment of the present invention has been described in detail. However, the present invention is not limited to the above-described embodiment.
Various changes can be made in the design without departing from the spirit of the invention described in the claims.
Although the hand lever device 10 is used to adjust the opening of the throttle valve CV of the internal combustion engine 2, the hand lever device of the present invention can be used for purposes other than adjusting the opening of the throttle valve CV. Needless to say. further,
The hand lever device 10 can be used by being directly attached to not only the bar handle 7 but also a U-shaped handle.

[0045]

As will be understood from the above description, according to the hand lever device of the present invention, the movable mechanism member such as the main lever can be moved to the case even when the case member is separated and separated from the handle. The member can be appropriately held, and as a result, the assembling work and the maintenance and inspection work can be easily performed. In addition, since the case member is externally fitted and fixed to the handle in a state where the concave portion and the convex portion provided on the handle and the case member are fitted, the fitting of the case member by the concave portion and the convex portion is performed. The rotation around the handle can be prevented and the movement in the longitudinal direction can be prevented, so that stable operability can be obtained at all times, no displacement of the cable tip position occurs, and the amount of operation of the main lever and position adjustment mechanism is reduced. As a result, the cable pulling amount becomes constant, and the opening degree of the throttle valve and the like become accurate.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a brush cutter in which an embodiment of a hand lever device according to the present invention is employed.

FIG. 2 is a left side view showing an embodiment of the hand lever device according to the present invention.

FIG. 3 is a plan view showing an embodiment of a hand lever device according to the present invention.

FIG. 4 is a right side view showing an embodiment of the hand lever device according to the present invention.

FIG. 5 is an enlarged cutaway left side view of the hand lever device shown in FIG. 2 with a left cover case removed;

FIG. 6 is a sectional view taken along the line VI-VI in FIG. 5;

FIG. 7 is a sectional view taken along the line VII-VII of FIG. 5;

FIG. 8 is a schematic perspective view showing a tension expanding mechanism of the hand lever device shown in FIG. 2 and a portion related thereto;

FIG. 9 is a perspective view showing an intermediate cover case of the hand lever device shown in FIG. 2;

FIG. 10 is an enlarged sectional view taken along the line XX of FIG. 2;

FIG. 11 shows a hand lever device shown in FIG.
Sectional drawing which shows the state which removed the right side cover case, the intermediate cover case, and the left side cover case from the handle.

[Explanation of symbols]

 2 Internal combustion engine 7 Bar handle 9 Recess 10 Hand lever device 11 Grip part 13 Cutting blade 17 Cable 20 Case member 21 One side (right) cover case 22 Intermediate cover case 23 Other side (left) cover case 29 Convex part 30 Main lever 40 Pull Amount expanding mechanism 41 Lever 45 Folding member (pulley) 50 Position adjusting mechanism 51 Sub-lever CV Driven member (throttle valve) O Sub-lever rotation axis

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification number Agency reference number FI Technical display location G05G 7/04 G05G 7/04 A

Claims (9)

[Claims] 1. A main member 3 for pulling a cable 17 connected to a driven member CV having a case member 20 externally fitted and fixed to a handle 7.
0 is rotatably held, the case member 20 has a one-sided cover case 21,
It has a three-part structure consisting of an intermediate cover case 22 and another cover case 23,
By removing the other-side cover case 23 from the intermediate cover case 1 and the intermediate cover case 22, the externally fixed state of the case member 20 to the handle 7 is released, and the one-side cover case 21 and the intermediate cover case 22 A hand lever device wherein the main lever 30 is held therebetween. 2. A main lever 3 for pulling a cable 17 connected to a driven member CV having a case member 20 externally fitted and fixed to the handle 7.
0 is rotatably held between the main lever 30 and the cable 17 in the case member 20.
In the hand lever device 10 in which a pulling amount expanding mechanism 40 for expanding the pulling amount of the cable 17 by the main lever 30 is provided, the case member 20 includes a one-side cover case 21, an intermediate cover case 22, and another side cover. The case 23 has a three-part structure. By removing the other side cover case 23 from the one side cover case 21 and the intermediate cover case 22, the externally fitted state of the case member 20 to the handle 7 is released. The main lever 30 is inserted between the one-side cover case 21 and the intermediate cover case 22.
A hand lever device, wherein a tension amount expanding mechanism 40 is held. 3. The main lever 30 includes a driven member C
The cable 17 connected to the V is connected via a turning member 45, and a position adjusting mechanism 50 for holding the turning member 45 at an arbitrary position is provided. The position adjusting mechanism 50 is provided between the one-side cover case 21 and the intermediate cover case 22. The hand lever device according to claim 1, wherein the folding member 45 and the position adjusting mechanism 50 are held. 4. The handle 7 and the case member 20.
The hand lever device according to any one of claims 1 to 3, wherein a concave portion 9 is provided in one of them, and a convex portion 29 fitted into the concave portion 9 is provided in the other. . 5. The handle 7 has a cylindrical shape, the recess 9 is provided so as not to penetrate the handle 7, and the intermediate cover case 22 is provided with a protrusion 29 that fits into the recess 9. 5. The method according to claim 4, wherein
3. The hand lever device according to claim 1. 6. The hand lever device according to claim 2, wherein the tension amount expanding mechanism 40 is a lever 41. 7. The position adjusting mechanism 50 includes a sub-lever 51.
7. The hand lever device according to claim 3, wherein the folding member 45 is attached to the sub-lever 51 at a position deviated from the rotation axis O. 8. 8. The hand lever device according to claim 3, wherein the folding member is a pulley 45. 9. The hand lever device according to claim 1, wherein the driven member is a throttle valve CV of the internal combustion engine 2.